DEMODULATION REFERENCE SIGNALS (DM RS) FOR PHICH OR PDCCH BASED RETRANSMISSION IN LTE A WIRELESS COMMUNICATION

摘要

Provided is a method for wireless communication which includes transmitting codewords according to an initial transmission rank receiving downlink transmissions indicating at least one of the codewords to be retransmitted constructing a demodulation reference signal (DM RS) to be sent with the at least one codeword to be retransmitted and retransmitting the at least one codeword with the DM RS according to a retransmission rank. The downlink transmissions may include one or more physical hybrid automatic retransmission request indicator channels and the DM RS may be constructed based at least in part on information in the downlink transmissions.